Improved bed-bottom



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ALBERT BINGHAM, OF NEWTONVILLE, MASSACHUSETTS, ASSIGNOR TO vWILLIAM S. MUDGETT, OF SAME PLAGE.

Letters Patent No. 70,687, dated November 12, 1867.

IMPROVED BBD-BOTTOM.

TO ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Be it known that I, ALBERT BINGHAM, of Newtonville,.in the county of Middlesex, and State of Massachusetts, have invented an improved Spring-Bed Bottom; and do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of which- Figure 1 is a top view, and

Figure 2 a longitudinal section of it, and

Figures 8 and 4 transverse sections taken through its head and foot-bars.

These figures show the bed-bottom as applied to a bedstead.

In the drawings, A denotes a bedstead, of which a a are the side rails, and b and c the head and foot rails. B and C are two bars, which extend between the two rails a a, and are supported thereon by metallic hangers d d d d extending from the ends of the said bars B C in manner-as represented. There is arranged over the head-bar B, and parallel with it, a bolster-piece or bar, D, from which' a series oi' pins, e e e e, extends, each of such pins being fixed to the bar D. Each of the said pins goes through the head-bar B, and also through one of a series of helical springs,ffff, and one of a series of slats,gg gg. The springs rest on the bar, and each of the slats rests on the upper end of one of the springs.v The slats are arranged parallel to each other, and are separate from the bolster-bamso that each slat can move independently of it. Furthermore, the several slats -at their lower ends rest on the foot-bar C, to which they may be connected by screws, as shown at h h, &c., each bar being provided'at its end with a notch, z', to receive the screws.

From the above it will be seen that in the bed-bottom as described, the bolster-bar D, by being supported on all the slats, can move up or down on them, but each slat, when pressed upon, will move down independently of the bolster-bar, and with the springen which the slat may rest. The bolster-bar serves to support that part of a bed which comes directly under the bolster or pillow or pillows, laid on such bed, the slats sustaining the rest of the bed. In order to connect the head-bar to the bolster-bar, I extend short pins le 7c transversely through the two external pins e e.

The bed foundation or bottom so made will operate to excellent advantage.

I am aware that it is not new'to support a series of slats on springs, and to have stationary guide-rods going through such-slats near their ends, the rods of each series of such guide-rods being connected together at their upper ends by a cross-bar, which is stationary while the bed-bottom is in use, such being as represented in the United States Patent No. 62,395. My invention differs materially from this, for all the `guide-rods c of it, instead of being stationary in the bottom bar, are movable vertically through it, and are fixed ar their upper ends to a bolster-bar resting on the slats, each slat'resting on a spring, andbeing capable of moving downward independently'of the bolster-bar. In fact, there is nothing in tho bed-bottom described in such patent which performs the oice of the bolster-bar and its movable pins e.

I am aware, also, that it is not new to support a series o!" slats at one end of each upon a cross-bar, each of them being also supported at or near its other ond uponone of a series of springs, resting on a cross-bar, such slats over` thc springs being vall connected by a belt or strip, so that one cannot .move without moving the other. This bod-bottom differs materially from my invention, because the said bed-bottom has no bolster-bar and guide-pins separate from-the slats, andto operate with respect to them as does the bolster-bar and pins exhibited in the accompanying drawings. p

. What I claim as my invention in a spring-bed bottom is as follows, that is to say, having its bolster-piece D, its series of pins e, and slats g, supported by sprin'gsf, so as to be movable'vertically together thereon, and so that each slat may move independently of the bolster-piece and its guide-pins, the whole being substantially described.

I also claim the improved spring-bed bottom as constructed, not only'with each of its slats, supported at its foot or lower end on a stationary cross-bar, but as having a bolster-piece,l D, series of pins e, and slats y, supported by springsf, so as to be movable vertically together thereon, and so that cach slat may move on its spring independently of the bolster-piece and its guide-pins, the whole being substantially as specified and represented ALBERT BINGHAM.

Witnesses:

R. H. EnnY, F. P. HALE, Jr. 

